Cell door locking mechanism



Nov. 11, 1941. H. s. HART EITAL CELL DOOR LOCKING MECHANISM Filed .Jan. 23, 1940 5 Sheets-Sheet l NOV. H. s. HART ET AL CELL DOOR LOCKING MECHANISM Filed Jan. 25, 1940 5 Sheets-Sheet 2 L/M L gwua/vvbod l awn/mug 1941- H. s. HART ET AL CELL DOOR LOCKING MECHANISM Filed Jan. 23, 1940 5 Sheets-Sheet 3 1941- H. s. HART ET AL CELL DOOR LOCKING MECHANISM 5 Sheets-Sheet 4 Filed Jan. 23, 1940 NOV- 11, H '5 HART ET AL CELL DOOR LOCKING MECHANISM 5 Sheets-Sheet 5 Filed Jan. 25, 1940 wen Mold .L. uf z Patented Nov. 11, 1941 FOUNITED STATES PATENT OFFICE CELL DOOR LOCKING MECHANISM Herbert S. Hart and Loyd J. White, San Antonio, Tex., assignors to Southern Prison Company, San Antonio, Tex., a corporation of Texas Application January 23, 1940, SerialNo. 315,270

14 Claims.

This invention relates to cell door locking mechanism for prisons and the like and aims, among other objects, to provide in a so-called medium security system positively operated and selective locking mechanism by means of which .any or all of the doors in a cell block may be locked in either open or closed position and, when unlocked, may be opened or closed by the prisoner. Another important aim is to provide in 'a remote control cabinet a single operating member which so controls and actuates the locking cmechanism that all of the doors may be nightlocked, day-locked or unlocked by the simple ex- ;pedient of shifting the operating member to one of three different positions. Also, the invention provides novel means to insure that all doors are closed and locked before being night-locked. Further, the invention contemplates provision of automatic means to prevent prisoners from rejleasing the locks of individual locked doors when the main locking lever is in the night-locking position or when a door or doors are selected to remain closed and day-locked while others are being unlocked and opened. Another aim is to provide double spring buffers for each of the doors in a system of this type whereby, when the -doors.are unlocked, they will be initially propelled toward open or closed position permitting the prisoners to move them the rest of the way 'when they will be locked automatically either in fully open or fully closed position.

Other aims and advantages of the invention will appear in the specification, when considered in connection with the accompanying drawings, wherein:

Fig. 1 is a vertical sectional view, partly in elevation, showing the lever and selector mechanism in a master control cabinet for the system;

I Fig. 2 is a fragmentary front elevation of the cabinet, the usual door being omitted;

Fig. 3 is a side elevation, partly in section, showing the locking mechanism above a sliding cell door, the door being day-locked, corresponding with the position of the main lever in Fig. 1;

Fig. 4 is a fragmentary side elevation of the locking mechanism shown in Fig. 3 with the locking mechanism in the unlocked position;

Fig. 5 is a horizontal sectional view of the mechanism with the parts inthe position shown in Fig. 4;

Fig. 6 is a sectional view taken on the line 6-6 of Fig. 5;

Fig. 7 is another view similar to Fig. 4 but showing a door in an intermediate position with 5 .row, as shown in Figs. 3 and9.

casings 21. shoulder extensions 28 and 29 coacting with aligned notches and 3| in the flanges of the upper and lower door angles 32 and 33, respecthe locking mechanism set automatically to lock the door either open or closed;

' Fig. 8 is a fragmentary sectional view taken showing the parts in the night-locked or deadlocked position; Fig. 12 is a fragmentary sectional view taken on the line l2--I 2 of Fig. 4;

Fig. 13 is a side elevation of a slotted index link;-and I 1 Fig. 14 is a similar view of a slotted index rocker or compound bell-crank cooperating with the link.

Referring more particularly to the drawings, the system illustrated is of the sliding door type, embodying -a plurality of cell doors arranged in line in a cell block, said doors adapted to be operated by the prisoners after being unlocked. In such systems, the locking mechanism is usually arranged within a longitudinal housing or cover box 20 extending above the line of doors and leading to a master control cabinet 2| of the 30 usual type conveniently arranged in one end of the cell block. 'In this instance, the improved locking mechanism is illustrated as being applied to two successive sliding doors 22 and 23 of a The doors are of the usual type suspended by hangers 24 from ordinary wheeled carriages 25 in the housing 20.

The individual locks for the doors are shown as being in the form .of vertical bars 26 extending through the bottom of the housing 20 and mounted for vertical movement in protecting They have upper and lower lateral tively, when the doors are in fully closed position. When the doors are in fully open position, these extensions 28 and 29 coact with similarly aligned notches 34 and in the door angles 32 and 33 respectively. The notches 30 and 34 are formed in the horizontal flange of the angle 32, while the notches 3| and 35 are formed in the vertical flange of the lower angle 33, the notch 3| being deeper than notch 35 for a purpose to be hereinafter described.

The doors are arranged to be initially pro- 2| (Fig. l).

ally connected to the; upper end of a bifurcatedv ;lever 44 which, in turn, is pivoted near its upper pelled toward open or closed position when the lock bars are released so that the prisoners may which, in turn, are pivoted on the pins 62. Each bell-crank has a rearwardly projecting arm 66- know that the doors are free to be moved and can then open or close them. In this instance, a combined buffer and door starter in the form ofa plunger 36 is slidably mounted on each door carriage in a tubular sleeve 31 and carries a pair oieXpiLnsible coil springs 38,v 39 one on either side of thesleeve, and confined between the sleeve and pins near the ends-of the plunger. The plunger is adapted to engage fixed stops 4 0 and 4| when the door is in closed or open position, respectively. As will be seen in Fig. ,3, when the door is in closed position,. the plunger will abut against stop 4|] and the spring '38: willbe.

unlock the door, the stored energy in'spring 38 will initially propel the door vto'the right toward i open, position. The lock bar may then. be. lowered, as will be hereinafter described; and the shoulders 28 and 29 will ride on, the .flanges of the door angles 32= a-ndz33 between the notches,

as shown in Fig. '7. The prisoner may then move the door to fully open position, thereby causing :the plunger to engage stop M and compress spring 39, the lockingshoulders 28 and 29, at the same time, dropping into the notches 34 and 35 to lock the door open.

The mechanism over each door .for operating the individual lock bars is connected to be actu-' :ated by a master lock operating bar 42 extending .the, length of'the housing 20 andhaving a link 43 at one end projecting into the control cabinet This link is shown as being pivotendand straddles a bracket 45.

This lever also straddles a locking segment 46 shown as having three locking notches 41, 48

I and 49 for a spring latch 50 onthe lever to. hold it in its night-locked, day-locked and unlocked positions,- respectively.

Also, within the control box there are shown .index or selector levers 5|, 52' for the locks of doors 22 and 23, it being understood that there areas many selectors as there are doors. These levers. are shown as being made'of flat bars in the form of. knife-blades hooked under a plate :53 on the rear wall of the control cabinet. They project. through vertical slots 54 in a selector -panel'55.. The shanks on the. endportions of the levers" are cylindrical, terminating in operating knobs 56, and whenthe levers. arepulled down, they are adapted to'be pushed inwardly with their cylindrical shanks engaged in circular key slots. .51 at the bottom. of the slots 54.- They are convnected by links 58 to bell-cranks 59 at the top of the control box and the belle-cranks are connected to actuate selector rods 66 for each cell door.

Referring now to the mechanism for operating the locks and,.more particularly, to Fig. 3, the

.arrangementzis such that the lockingbars- 26 may be moved to all three positions by only a slight movement of the master bar 42. In-this instance, themaster bar is mounted to reciprocate near the rear wall of the housing or cover box.

A series of metal plates 6| are shown as being welded or otherwise secured to the back wall and carry horizontal. pins 62 projecting through elongated. slots 63 in the master bar.. The master bar 42 is shown as being channel shaped and the ;pins: 62 each carrya. roller 64in the channel so that the upper'flange rides on the rollers. The rear ends of the selector. ro.ds.--6,0-are. shown as compressed. When the lock bar is raised to Pivoted ahead of the bell-crank 6 5 and on the master bar 42 there is shown anoperating or 7 index link 12 projecting rearwardly between the fingers 68 and 69 and against the arm 66 and it has an inverted T-slot 13 which cooperates with the curved T-slot 61 normally to impart actuating movement to the locking bar 26 through a pin 14 and a pair of crank arms l5and I6, pivoted on a horizontal pin 1! also mounted on the plate 6|. The pin 14 is secured to the'upper end of the arm 1-5, and projects lthroirghboth being. 'pivotally connectedto:..bell,-cranks. .65,

its day-locking position.

- a door.

slots 61' and 13. The arms 15 and;16 together form a bell-crank but the arm 15 is permitted'to swing slightly relative to the arm "l6'to permit thelocking bar extensions 28 and 29. to ride on the 'door angles and snap into locking engagement with the locking notches by spring action.

For that purpose, the upper side of the arm "has an enlargement 16 having a bore carrying an 'expansible spring lfiacting on one side'of the link 15, a pin being inserted throughthebo-re v to: retain the spring inplace. The enlargement .has a bifurcated'extension 3| straddling the arm 1'5 and a spacerblock or member 82'is secured in the slot to act as a stop to prevent too much relative movement of the arms 15 and I6; Now,it

will be understood that when the arm 1:5 is swung toward the right by virtue of "movement of the master bar 42, the lockingbar 26 will be moved downwardly toward its night-locking position. In Fig, 3, it is shown as having been moved to That position corresponds with the position of the lever 44 shown in full line position in Figs. 1 and 2'.

The relative position of the bell-crank arm 66 and the operating or index link 12 determines whether any door may belocked orunlocked and, incidentally, the link 12' is confined between the fingers 68 and; 69 to oscillatewiththe crank arm 66 when the selector is operatedto index out It will be obvious that when the -horizontal part of the inverted T-slot 13 in theindex or operating link is raised to the position; shown in Fig. 9, this link is free to move back and forth with the master bar- 42 without imparting any lock operating movement to the operating arms 15 and 16. When it is in the position'shownin Fig. 3, any movement imparted to the master bar 42- will be transmitted to the lock bar. The bellcrank orindex rocker 65 is simply operated to control the position of the inverted T-slot-in the 'operating'link l2, and thereby index out any door that may be selected to remain closed. In all other positions, except that shown in Fig. -9, this operating link is always'positively engaged with the pin l4 on the arm 15. Thenormalposition of the two slots relative to thepin 14 is correctly shown in Fig. 3, in which thedoors happen to be in day-locked position. That is to say,-the

pin is in the stem or vertical branch of the slot l3 and at the center of the horizontal portion of the slot 61.

Thus, the pin is free to belmoved back and. forth in the horizontal curved part of the; slot 6]. Now, whentheindex-bell-crankzror .of the slot .61 will engage 12 is. raised so that the the'horizon'tal part of the slot 13. It will be ob- J :vious that the pin is then 1 part of .right to index out a door only when .bar 42 and bell-crank 15-16 are in day-locking cause these are vazcaerzz :which have been lockedopen, the lever 44 is .again operatedto'move it to its unlocking position and the opened doors are kicked toward rocker B5is swung to the right to index out a for example, the stem the pin 14 and the link 14 is in the center of door, as shownin Fig. 9,

pin.

locked against swinging movement and the master bar 42 is therefore left free to move back .and forth to operate the locks of other doors because the horizontal be noted that the rocker 65 may be swung to the the master position and a door is either open or closed, be-

vertical branches of the slots 61 and 13 are in :alignment and the extension 83 is free to swing without striking the end of the enlargement 18. It will be understood that Fig. 3 represents the position of the parts the selector levers in the control cabinet are in .the upper position or at the top of the knife blade slots 54 and the master lock operating lever '44 has been swung to the day-locked position Fig. 9 represents;

shown in full lines in Fig. l; the position of the parts over the firstcell door when an index or selector lever, such as the lever 5|, has been pushed down to index out that door so that it cannot be operated by subsequent movement of the master operating lever 44. It:

will be noted that when the index lever isswung to its lowermost position and pushed inwardly -to lock it in that position, the index rod 68 is moved to the right and carries with it the index rocker or bell-crank 65,-compressing the springa 10. As has already been explained, the master locking bar 42 is now free to be moved back and forth without disturbing or actuating the lock .for that cell door.

26 and thus prevent a prisoner from raising it. -when the door is indexed out, the index bell- 'crank 65 is shown as having a depending short To dead-lock the lock bar bracket extension 83 having a lateral flange or stop shoulder 84 adapted to swing .just above the enlargement 18 on is the only one which has been indexed out or is -back to its day-locked position, as shown in full lines in Fig. 1, so that the parts are in the posi- ..tion shown in Fig. 7. In that position, the

spring 19 in the compound bell-crank -13, exerts spring pressure on the locking bar so that its locking shoulders ride on the top flanges of the angles 32 and 33 of the respective cell doors. They are ready to snap into locking po- -sition as soon as thedoors reach their fully opened position and they snap into the shallow 'notches 34 and 35 near the front edges of the doors.

Now, when. it is desired to unlock the doors the slot 13 coacts with pin 14. It should the only times when the two.

for all of the locks whenv the arm 15 so that the. -arm cannot be raised. This is the position of the locking mechanism for all of the doors when they are indexed out to remain closed and locked while others are being unlocked.

Let us assume, for example, that cell No. 1.

- 18. is to arrest the movement of the toward night-locking position when any of the to remain closed and looked, as shown in the i control panel. Then it is only necessary to grasp .the hand grip of the master operating lever 44 and swing it to its outermost position to unlock;

' ing engagement with the The master. lever to. its vertical position and .notch. The master bar moves the parts to the .noted that the operating 'its unlocked position.

.main closed, by operating the .in its day-locking position.

closed position so that the prisoners can finish closing them, the lever being again returned by the prisonkeeper to the day-locked position, so that the locking bars will again snap into lockdoors in closed position engaging the locking notches 38 and 3|.

Assuming that the closed and locked doors are to be night-locked, all of the selector or index levers must be released and in raised position. 44 is then swung rearwardly locked in the back so that the lower 26 drop to a point position shown in Fig. '11," shoulders 29 on the lock bars near the bottom of the deep slots3l in the vertical angle flanges 33 on the doors. It will be link 12 haspulled'the pin 14 to the forward end of the horizontally curved portion of the slot 61.

To insure that all doors are night-locked and to prevent the prisoners from raising any of the lock bars, the master bar is shown as carrying 'depending .T-shaped brackets adjustably secured to the master bar by bolts 86 passing through slots81in the master bar. Each brackethas a stop finger 88 adapted to engage the ends of the extensions 8| of the enlargements The main purpose of these stop members master bar 42 because the lock operating arm 16 cannot then swing to the position shown in Fig. 11, in which position the locking shoulder 29 is in the bottom part or" the deep notch 3|, as indicated in Fig. 3. Therefore, unless all doors are closed, it is impossible for an attendant or keeper to move the main locking lever to its night-locking position. In fact, he cannot even closefthe door of the control cabinet for the night, because the main lever 44 will project beyond. the front wall, as shown in Fig. 1. This provides means automatically to determine that all cell doors are locked closed for the night. Furthermore, the stop members assist in impartinglocking movement to the lock operating arms 15 against the action of the springs 19 when the master locking bar approaches the night-locking position. The stop members further act as safety locking abutments for all of the operating arms 15 when they are in the night-locking position, so that a prisoner cannot raise a locking bar 26 to unlock his cell door without moving the master-bar 42 which is locked by the lever 44.

After all of the cell doors have been'locked sires to release all of the prisoners at once, it is only necessary for him to open the control cabinet and move the main operating lever 44 to This can be done very quickly and also enables an attendant to release all of the prisoners in an emergency. He

does not even have to operate any of the index or selector levers. In fact, it is impossible to leave any door indexed out when the doors are night-locked. As has already been explained, however, he can index out the locks for any particular cell doors, which he selects to rerespective index or selector levers when the operating lever is Then, the locking mechanism for the closed and locked cell doors #will remain in the safety day-locked position of an attendant and, at the same time, "prisoners may be given freedom to go and come 5 .from their cells, each being required to open and close his own cell door. however,

'that the improved locking simple in its construction locked position afiord the 'stricted to the particular -a'plurality of index levers trol cabinet for operating the selector mechaj 'nism; a" master operating lever. for the master bar 'movable to night-locked, day-locked and unlocked apositions also arranged inthe control 3 cabinet; a locking segment for the master oper- 1 ating' lever having notches --least two positions, one 'in' i the index levers to ronly, to renderany shown in Fig. 9. Thus,.the locking system be used to afford maximum security at the can will the It is to be understood, that substantially the same locking mechanism may be employed in fully selective isystems having a master door operating bar. :Moreover, it is applicable to cell systems having swinging doors.

From the foregoing description, .it. will :be .seen

system is relatively and easy to operate. It requires no particular skill on the part of'an attendant or keeper to loperateit. The safety locking features for both day-locked and nightsame security as most of the so-called maximum security installations.

'Furthermore, it is. contemplated that such systems will he demanded by practically all ordifnary penal institutions.

Obviously; the present invention islnot reembodiment thereof herein shown and described. Moreover, it is not indispensable that all the features of the invention be used conjointly, since they maybe employed advantageously in variouscombinations 1 and subcombinations.

What is claimed is:; I 1. In a jail cell installation-having a plurality'of cell doors, individual locks for the doors;

amaster lock operating bar; means normally connecting saidmaster bar-to operate the sevferal looks; individual selector mechanism for each door operable from'a remote control. station'and connected to renderinactive the lock operating connections to any of said locks, leaving the master barfree to operate the remaining looks; a single operating member connected to said master bar having three operating positions, onein which all doors must be securely or night-locked closed, a' second in which the locks are moved to an intermediate'or day-locked position so that the selector mechanism tuated to ren'deriany'lock operating inactiv and in which the doors remain locked feither open or closed and a third in may be acconnection which all doors not selected to remain locked are unlocked; :and means on the master bar coacting with the locks connected to prevent the operating mechanism from being moved to nightlocked position unless all doors are closed.

2. In a jail cell installation having a plurality of cell doors, individual locks for'the doors; a master lock operating bar; means normally connecting said master bar to operate the several -locks; selector mechanism connected to render connections toany master bar free to inactive ,the look operating of said locks, leaving the operate the remaining locks; a master control master control bar; in the master concabinet at'one end of the for looking it in at which the "locks have been moved from a night-locked position to an 1 intermediate or day-locked position, permitting be actuated in that position, I

lock operating connectionin- "ating mechanism from being moved to nightindividual lock bars for :door including icpcac'm active and thereby index out any door or doors "which are to rrem'ainlockedin' either open or velosedposition and another in which all doors notselected :to remain :locked are unlocked; and

means on the master bar coactingwith the locks' connected'tol prevent the operating mechanism from being moved to night-locked position unless I all doors are closed.

3. .In a jail cell installation having a plurality of cell doors,*individ.ua1.locks for the doors; .a

' master lock operating bar; means normally. connectingrsaid master barto operate the several locks; individual selector mechanism' for each door operable fromra remote. control station and connected to. render inactive the lock operating connections to any of said locks, leaving the master. bar free to operate a master control cabinet atsone end of the master control bar; a plurality.

the remaining locks;

of index levers in the master control cabinet for operating the selector mechanism; a master operating lever for the master bar also arranged in the control all doors not, selected-t0 remain locked are unlocked; and means on the master bar coacting with the locks connected to prevent the operlocked position unless all doors are closed.

4. In a jail cell installation of the class described having a plurality of sliding cell doors, individual lock bars for the 'doors; a housing above the doors; a master lock operating bar in the housing; means normally connecting said master bar to operate the respective locking bars; selector mechanism including rocker members and selector rods connected to render inactive said operating connections many of said looking bars, leaving the master bar 'freeto opera ate the remaining lock bars; a mastercontrol cabinet at one end of said housing; index members in said cabinet connected to the respective selector rods; a master operating member also in said cabinet connected to reciprocate said master bar and move it to night-locked, day- Y lockedand unlocked positions; means for looking said master operating member in at least two lock operating positions, one in which all of said locking bars are held in the intermediate or day-locking position permitting the index mem bers to be operated in that position, only, to select any of the doors to remain locked, leaving the master bar free to operate the locks of the remaining doors, and another in which all doors not selected to remain closed and locked are unlocked; and means-on the master bar coacting with the locks connected to prevent the operating 'mechanism from being moved to nightlocked position unless all doors are closed.

5. In a jail cell installation of the class described having a plurality of sliding cell doors, the doors; a housing above the doors; a master lock operating bar in the housing; means normally connecting said master bar to operate the respective locking bars; individual selector mechanism for each rocker members and selector rods connected-to render inactive said operating con nections to any of said lock bars, leaving the master bar free to operate the remaining lock bars; a master control cabinet at one end of said housing; index members in said cabinet connected to the respective selector rods; a master operating member also in said cabinet connected to reciprocate said master bar; means for locking said master operating member in at least three lock operating'positions, one in which all doors must be securely or night-locked in closedfposition, a second in which the locking bars are moved to an intermediate or day-locked position so that the selector mechanism may be actuated to render any lock operating connection inactive and in which the doors remain lockedeither open or closed, and a third in which all doors not selected to remain locked are unlocked; and means on the master-bar coacting with the locks connected to prevent the operating mechanism from being moved'to nightlocked position unless all doors are closed.

6. In a jail cell installation having a plurality of cell doors, individual locking bars for the doors; a master lock operating bar; means normally connecting said master bar to operate the several locks; individual selector mechanism for each door operable from a remote control station and connected to render inactive the lock operating connections to any of said locking bars, leaving the master bar free to operate the remaining locking bars; a single operating member connected to said master bar having three operating positions, one in which all doors must be securely or night-locked closed, a second in which the locking bars are moved to an intermediate or' day-locked position so that the selector mechanism may be actuated to render any lock operating connection inactive and in which the doors remain locked either open or closed and a third in which all doors not selected to remain locked are unlocked; and means cooperating with said lock operating connections'connected to prevent the master lock operating bar from being moved to the night-locking position unless all doors are previously closed and locked.

'7. In a jail cell installation having a plurality of cell doors, individual locks for the doors; a master lock operating bar; means normally connecting said master bar. to' operate the several locks; selector mechanism connected to render inactive the lock operating connec ions to any of said locks, leaving the master bar free to operate the remaining looks; a single operating member connected to said master bar having ate the remaining looks; a master operating control cabinet at one'end of the master lock operating bar; a plurality of index members con nected to operate the selector mechanism for the respective locks and arranged in the cabinet; a master operating lever connected to recipro cate the master bar and adapted to be moved to three lock operating positions, one in which the doors are unlocked and another in which' from'being released'by a prisoner; and a third:

position in which all doors must be night-locked closed; and additional stop means to prevent the locks from being releasedfrom their night-locked" position.

9. In a jail cell installation having a plurality of cell doors, individual locks for the doors; a

master lock operating bar; means'normally connecting said master bar to'operate the several locks; selector mechanism connected to render inactive the lock operating connections to any of said locks, leaving the master bar free to 'op'-' erate the remaining locks; a single operating member connected to said master bar having three operating positions, one in which all doors must be securely orni'ght-lo'cked closed, a sec-I ond in which the locks are moved to an intermediate or day-locked position so that the selector mechanism may be actuate'd'to render any I connections to prevent a prisoner irom releas-J ing any lock in the night-locking position; a'secthree operating positions, one in which all doors V must be securely or night-locked closed, a second in which the locks are moved to an intermediate or day-locked position so that the selector mechanism may be actuated to render any lock operating connection inactive and in which the doors may be locked either open or closed and a third in which all doors not selected to remain locked are unlocked; and means to prevent the master bar from being operated. to nightlock all of the doors unless every door is closed, said means also being connected to the master bar to prevent the lock bars from being released by the prisoner when the master bar is in the night-locking position.

8. In a jail cell installation having a plurality of cell doors, individual locks for the doors; a master lock operating bar; means normally connecting said master bar to operate the several locks; selector mechanism connected to render lock operating connection inactive'an'd in which the doors may be locked either open'lor'closed,

and a third in which all doors not selected to remain locked are unlocked; stop means on. the

master bar cooperating'with the lock operating 0nd stop member forming part of the selector mechanism also cooperating with the lock operating connectionsto prevent a prisoner fromreleasing the lock of any door which has been previously day-locked and selected to remain locked closed; andspring means to start all un-- locked doors toward'openor closed position when they are unlocked sothat the prisoner may fin-- ish the opening or closing operation.

10. In a jail cell installation of the character described having a plurality of sliding cell doors, individual vertical locking bars for each of the doors; a locking member on each of the doors having a pair of notches to receive said locking bar, one notch for the closed and locked position of the door being deeper than the other notch; a cover box above the doors; a master lock operating bar in the cover box; normally active lock operating connections between the master bar and the individual locking bars; selector mechanism constituting a part of said connections including means to render inactive the operating connection between said master bar and any of the locking bars; a master control box at one end of said cover box; index members in said control box connected to operate said selector mechanism whereby any door may be selected toremain locked in either open or closed position; a master operating member connected to the master bar; andmeans releasably to lock said master operating member in at least inactive the lock T operatingconnections 'to any of said locks, leaving the master bar free to opertwo positions, one in which theindividual locking;

bars are seated in the deeper: notches of the doors to night-lock them in ol'osedposition only, and another in which the locking bars are moved to a secondor day-locked position sothat' any doors may be selected to remain closed andlocked inthe day-locked position and the respec tive locking bars may be seatedineither. of the notches in each door, whereby any. door may be locked'in. either open or in closed position, said unlock all doors. 1

. 11. Ina jail cellinstallation ofv the class described having a plurality of sliding cell. doors, individual locking bars; for the respective doors;

lever. being movable to a difierent position to notched members on each door cooperating with the locking bars tolock the doors in either open orclosed position; a cover box above the doors; areciprocating. master bar in the cover box; op-

' erating links and arms normally connecting the master bar to the respective. locking bars in-. cluding a bell-crank member having spring biased arms normally resisting movement toward each other, one of saidarms being. directly 0on nected-to a locking bar;"'and'means connected to operate the master bar to impart locking and unlocking movement .to the respective locking bars so that the locking bars will engage or dis-,

engage the notched members-of the doors, said notched locking members on the doors-having a track on which the locking bars are adapted to ride when a door is being moved ,from one position to another, said locking bars adapted to be raised out of the notcheswhen the masterbar a master lock operating bar; means'normally connecting said masterv bar to operate the several locks; seleotormechanism connected to render inactive the lock operating connections to any}, of said locks, leaving the master bar free to operate thejremaining looks; a, single operating member connectedto saidmaster bar having three operating positi0ns,-one-in which all doors must 'be securely or night-locked closed, a secondiin which the locks are moved to an intermediate'or day-locked position, so. that the selec tor mechanism may be actuated to render any-- remain locked are unlocked, said lock operating connections each including a pivoted link on. said: master bar having an inverted T-slot; a. bell-crank selector member on a fixed pivot havingronerarm adjacent to said pivoted link and. presenting a T-slot co-acting with said inverted: T-slot; and a bell-crank member having one armv connected to a lock and another arm having apin projecting through both of said T-slots,the. selector bell-crank member being operable to. swing said slotted arm and link together relative to said pin and. said T-slots being arranged. to'register with the pin to permit the master bar to be moved without imparting actuating movement-through the pin to the lock operating bellcrankmember when the selector mechanism is actuated to render the lock operating mechanism inactive. 1 i r 1 13. In a jail .cell installation having a plurality of cell doors, individual locks for the. cell doors; a master lock operating member above the doors;

;means normally connecting said member :to un-k lock, day-lock or night-lock said individual locks; selector mechanism operatively connected to said connecting means to render it inactive so. that any selected doors may remain locked while the remaining locks are actuated; and stop means movable by said selector mechanism con-.

'nected positively to prevent the se ected looks:

from being unlocked;.and means on the operating memberconnected to prevent the mechanism from being moved. to nightelocked position.

unless all of the cell doors are closed.

l4.In a' jail cell installation having a'plurality of cell doors, individual locks for the doors;

actuating means connected to the locks to move them to. unlocking position and eitherof two locking positions, one locking position for daylocking the doors in closed or open position and the other locking position for night-locking the doors in closed position; selector means operable from a remote control station for disconnecting the looks from the actuating means; means associated with the actuating means to dead-lock the locks in night-locking position; and separate means associated with the selector means to dead-lock the locks in day-locking position.

- v HERBERT HARTL -LOYD J. WHITE. 

